This longitudinal investigation charted the course of cognitive and language development from the prelinguistic period to multiword productions in 19 typically developing toddlers and 4 toddlers who were subsequently identified as having a late onset of expressive language. Three different developmental profiles were identified, and predictors of…

The effectiveness of two language treatment methods, modeling versus modeling plus evoked production, in promoting productive vocabulary in three late-talking toddlers was compared. Two subjects differed as to which particular treatment method was associated with better performance. Neither treatment method was effective for the third subject.…